Neodymium lidar tracks spray cloud from helicopter. A few minutes after spreading the smoke cloud, it begins to disperse. Insecticide evaluation project conducted by PSWFRES of Berkeley, California. Sawtooth National Forest, Idaho.
Photo by: J. Louise Parker
Date: June 1967
Credit: National Archives and Records Administration
RG# 95-GP Records of the Forest Service General Subject Files USDA Forest Service Negative Number: 516630